3D printing device using block unit

Abstract

The invention provides a 3D printing device using a block unit, and the block unit is made of fiber reinforced thermoplastic resin. The 3D printing device comprises a first bracket, a driving part, aconveying pipe, a first pair of rotary roller assemblies and a second pair of rotary roller assemblies, wherein the first bracket has a first operating state of a reciprocating motion in a horizontaldirection and a second operating state of a reciprocating motion in a vertical direction by virtue of the driving part; the conveying pipe is arranged on the first bracket and is used for conveying the block unit; the first pair of rotary roller assemblies are arranged on the first bracket and below the conveying pipe and are used for conveying the block unit output by the conveying pipe below; and the second pair of rotary roller assemblies are arranged on the first bracket and below the first pair of rotary roller assemblies and are used for outputting the block unit output by the first pairof rotary roller assemblies to a pre-printed surface and applying pressure in a Z direction. According to the 3D printing device, the technical problems of poor mechanical properties of 3D printing workpieces prepared from continuous fiber reinforced materials and low printing speed of large workpieces at present can be solved.

Description

technical field [0001] The invention relates to the technical field of 3D molding, in particular to a 3D printing device using block units. Background technique [0002] 3D printing technology is an advanced manufacturing technology integrating machinery, materials, automation, and software. It is also a low-cost, automated advanced molding method that has been given high expectations. Meet people's needs for customization and personalization. So, what is 3D printing technology? The American Society for Testing and Materials gave a definition: "A method that is diametrically opposed to the traditional material removal processing method, by adding materials, based on 3D CAD model data, usually using a layer-by-layer manufacturing method, directly manufacturing a material that is completely consistent with the corresponding mathematical model The manufacturing method of the three-dimensional physical solid model." (Feng Chunmei, Yang Jiquan, Shi Jianping, "3D Printing Formin...

AI Technical Summary

Problems solved by technology

[0003] Based on the definition of printing, it is given that the printing process is in the form of layer-by-layer slice printing and layer-by-layer superposition, especially the fused deposition method (FDM) selects linear or powdery materials, which are deposited and solidified layer by layer, with the highest speed It can reach 500mm / s. For large parts, the printing time is too long, which increases the equipment utilization time and manufacturing cost; this is not conducive to the production of large-sized parts

[0004] In addition, 3D printed parts currently have insufficient mechanical properties. The tensile strength of parts printed with pure resin is less than 100 MPa, and the tensile strength of parts printed with continuous fiber reinforced materials can be close to 800 MPa.

Although the mechanical properties of parts printed with continuous fiber reinforced materials are improved to a certain extent compared with pure resins, when printing with this material, the fiber content of the material is generally controlled below 40% v, too low fiber content Not conducive to retaining the mechanical properties of fibers

Therefore, how to improve the mechanical properties of 3D printed parts and the printing speed of large-sized parts to realize the advantages of printing technology in micro-manufacturing is a difficult point, which is also a bottleneck of printing technology at this stage

Images